Power-jack



G. R. WRIGHT.

POWER JACK.

APPLICATION FILED DEC. 9. 19m.

Patented Nov.

2 SHEETS-SHEET l.

UNITED STATES PATENT OFFICE.

GEORGE R. WRIGHT, OF FORT WORTH, TEXAS.

POWER-JACK.

Application filed December 9, 1918. Serial No. 265.938.

a pump operating means, in the same manner as the efficiency of anydrive mechanism is increased by the use of a fiy wheel.

A further object is to provide weighted pendulums so connected to thedriven elements as to act directly upon them during the operation of themechanism, the use of .described and pointed being understood that thependulums permitting a considerable reduction in the power required tooperate a pump.

With the foregoing and other objects in View the invention consists ofcertain novel details of construction and combinations of parts whichwill be hereinafter more fully out in the claims, it various changes maybe made in the construction and arrangement of the parts withoutdeparting from the spirit or sacrificing any of the advantages of theinvention as set forth in the ap ended claims.

n the accompanying drawings the preferred form of the invention has beenshown.

In said drawings- Figure 1 is a front elevation of the jack.

Fig. 2 is a plan view thereof.

Fig. 3 is a ,view showing in full and dotted lines two positions towhich the parts will move during the operation of the mechanism.

Referring to the figures by characters of reference, 1 designates astand or supporting frame having a bearing 2 for a" centrally supportedwalking rod 4 is pivotally connected to one arm of the walking beam andmay be driven by any suitable mechanism so as to move the walking beamat a predetermined number of strokes per minute. V

Pivotally connected to the ends of the Specification of Letters Patent.

beam 3. An operating Patented Nov; 23, 1920.

walking beam arependulums 5 each includmg a weight 6 and journaledwithin the walking beam or upon one side thereof at points 7 equidistantfrom the bearing of the walking beam, areo positely disposed bell cranklevers 8 of tlie same size and the lower arms of which are extendedtoward each other. The free ends of these lowerarms are pivotallyconnected as at '9 to the upper ends of the pump rods 10.

The upper ends of the upper arms of the levers 8 arepivotally connected,as at 11, to a link 12. They are also pivotally attached to connectingrods 13 which extend downwardly past the walking beam and are pivotallyconnected, at 14, to the pendulums.

VVhenthe walking beam is oscillated by the application of power theretothrough the reciprocating rod 4, the pump rods 10 will be given areciprocating movement as ordinarily. As the oscillation of the beamcontinues, however, the pendulums will begin to swing until the relativemovement thereof will be transmitted, through the rods 13 and levers 8to the rods, thereby to increase the movement of said rods 10. In otherwords, when the walking beam travels from one limit of its movement,indicated by dotted lines in Fig. 3, the pendulums will maintain theirpositions relative to the beam and the rods 10 will be shifted asordinarily until the beam reaches the other limit of its movement whereit is brought to an abrupt stop. This will cause the two pendulums to beimpelled to the positions shown by full lines in Fig. 3 with the resultthat the bell crank levers will impart further movement to the pump rodsin the direction in which they had been moving. At the same time thependulum on the lowermost arm of the beam 3 having been swung inwardlytoward the center of the beam and the otherpendulum having been swungoutwardly, the upper arm will overbalance the lower arm so that thepower required to return the beam to its other extreme position will bereduced.

What is claimed is '1. The combination with a walking beam and means foroscillating the same, of a pendulum hung from each end of the beam,oppositely disposed levers movable with the beam and equidistant fromthe bearing thereof, a link connection between the levers, I

crank levers upon tlre Walking beam, 9, hnk connectmg the upper arms ofsand levers, and rods connecting the upper arms 10 of said levers to thependulums at points below the beam, and pump rods connected to the lowerarms of the respective levers.

In testimony that I claim the foregoing as my own, I have hereto affixedmy slgnature in the presence of two Witnesses.

GED. R. WRIGHT.

Witnessesr FRED. D. HOFFMAN, D. W. MARTIN.

